I got some extra wheels and tires that appeared to be almost new 275 60 18 Michelins ltx,so I take them to the local America's tire and and ask how much to put tpms in the tires. He informs me that the tires are 10 Years old and he can't even put air in them,I chuckled, told him I could put air in them myself besides he wanted 240.00 for 4 sensors and we didn't even get to the mounting and balancing charges. So being of sound mind and ability to keep my tire pressure checked manually what sounds, warnings , beeps besides the orange() do I have to look forward to. What do others think of Tpms , if you could replace the batteries it would almost be worth it, reminds me of ink cartridges and that really expensive chip in them to make sure you can't refill them,marketing genius.